Vacuum system having condenser and root vacuum pump set

Abstract

A vacuum system having a condenser and a root vacuum pump set includes an independent inlet condenser set having an inlet end for receiving vapor inputted from an output of an air cooling power generator condenser of a generator; air in the vapor being condensed, and the surplus air is outputted; a root vacuum pump set including at least one root vacuum pump; the root vacuum pump set further including an input end and an output end; the input end being connected to the independent inlet condenser set; air outputted from the independent inlet condenser set being inputted to the at least one root vacuum pump for compression and then the compressed air being outputted from the output end; and a backing pump connected to the output end of the root vacuum pump set by using an output pipe; the backing pump serving to receive air outputted from the root vacuum pump set.

What is claimed is: 
     
         1 . A vacuum system having an independent inlet condenser set and a root vacuum pump set, comprising:
 an independent inlet condenser set ( 10 ) having an inlet end ( 11 ) for receiving vapor inputted from an output of an air cooling power generator condenser ( 100 ) of a generator ( 1 ); the output vapor which is mixture of non-condensable air and water steam; the water steam capable to be condensed, and the surplus air being outputted;   a root vacuum pump set ( 30 ) including at least one root vacuum pump ( 40 ); the root vacuum pump set ( 30 ) further including an input end ( 31 ) and an output end ( 32 ); the input end ( 31 ) being connected to the independent inlet condenser set ( 10 ); air outputted from the independent inlet condenser set ( 10 ) being inputted to the at least one root vacuum pump ( 40 ) for compression and then the compressed air being outputted from the output end ( 32 ) and   a backing pump ( 50 ) connected to the output end ( 32 ) of the root vacuum pump set ( 30 ) by using an output pipe ( 33 ); the backing pump ( 50 ) serving to receive air outputted from the root vacuum pump set ( 30 ).   
     
     
         2 . The vacuum system having an independent inlet condenser set and a root vacuum pump set as claimed in  claim 1 , wherein the independent inlet condenser set ( 10 ) is connected to a liquid collecting and recycling tank unit ( 20 ) for collecting condensed liquid and soft water from the independent inlet condenser set ( 10 ), in that, the soft water is from the air cooling power generator condenser ( 100 ). 
     
     
         3 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the liquid collecting and recycling tank unit ( 20 ) is capable to collect condensed liquid and soft water in vacuum state automatically and continuously. 
     
     
         4 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the inlet end ( 11 ) of the independent inlet condenser set ( 10 ) is capable of suffering from a pressure larger than 10000 Pa. 
     
     
         5 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , further comprising: a heat exchanger ( 60 ) serially connected to the output pipe ( 33 ) for cooling air outputted from the root vacuum pump set ( 30 ) and the cooled air being inputted to the backing pump ( 50 ). 
     
     
         6 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein each root vacuum pump ( 40 ) is capable of suffering from a pressure larger than 10000 Pa (Pascal). 
     
     
         7 . The vacuum system having a condenser and a root vacuum pump set as claimed in claim I, wherein the root vacuum pump ( 40 ) is selected from two blade root vacuum pumps, three blade root vacuum pumps, air cooling root vacuum pumps, or cascade root vacuum pumps. 
     
     
         8 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein each root vacuum pump ( 40 ) is connected to an electric driving device ( 405 ) for driving a respective root vacuum pump. 
     
     
         9 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the at least one root vacuum pump ( 40 ) of the root vacuum pump set ( 30 ) is one root vacuum pump. 
     
     
         10 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the root vacuum pump set ( 30 ) includes a plurality of root vacuum pumps ( 40 ) which are serially connected; the air outputted from the independent inlet condenser set ( 10 ) flows through the plurality of root vacuum pumps ( 40 ) sequentially for being compressed several times; and two adjacent root vacuum pumps ( 40 ) are connected by an air pipe ( 401 ). 
     
     
         11 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the backing pump ( 50 ) is a vacuum pump which can vent air to the atmosphere. 
     
     
         12 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein the backing pump ( 50 ) is selected from one of liquid circulated pumps, vapor jet pumps, atmosphere jet pumps and water flushing pumps. 
     
     
         13 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein when the air pressure of the air from the root vacuum pump ( 40 ) of the root vacuum pump set ( 30 ) is lower than a predetermined value, the backing pump ( 50 ) do not acted, while the air from the root vacuum pump set ( 30 ) directly bypasses through the backing pump ( 50 ) to be drained out. 
     
     
         14 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein liquid collecting and recycling tank unit ( 20 ) has an automatic double valve set up device ( 201 ) and a water level gauge ( 202 ) that is connected to a controller ( 203 ). 
     
     
         15 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 1 , wherein each root vacuum pump ( 40 ) has a casing ( 41 ) which has an inlet ( 411 ) and an outlet ( 412 ); an interior of the casing ( 41 ) is formed with a vacuum chamber ( 42 ) and two bearing rooms ( 43 ) at two sides of the vacuum chamber ( 42 ); the vacuum chamber ( 42 ) is connected and communicated to the inlet ( 411 ) and the outlet ( 412 ); a driving shaft ( 44 ) is installed within the casing ( 41 ) and penetrates through the vacuum chamber ( 42 ) and the two bearing rooms ( 43 ); one end of the driving shaft ( 44 ) passes out of a right wall ( 415 ) of the casing ( 41 ); a blade set ( 45 ) is installed within the vacuum chamber ( 42 ) and is installed on the driving shaft ( 44 ); the gas mixture is inputted from the inlet ( 411 ) to the vacuum chamber ( 42 ); by rotation of the blade set ( 45 ), the gas mixture is compressed and is outputted from the outlet ( 412 ); inner connection walls ( 413 ), ( 414 ) between the vacuum chamber ( 42 ) and the two bearing rooms ( 43 ) are installed with respective bearings ( 46 ) which are arranged to be around the driving shaft ( 44 ); as well as an opening of the right wall ( 415 ) of the casing ( 41 ) is formed with another bearing ( 46 ) around the driving shaft ( 44 ); the bearings ( 46 ) support the driving shaft ( 44 ); the bearings ( 46 ) completely seal spaces between the driving shaft ( 44 ) and the inner walls of the casing ( 41 ) so that the vacuum chamber ( 42 ) is completely isolated from the two bearing rooms ( 43 ); therefore, liquid out of the casing ( 41 ) and in the two bearing rooms ( 43 ) cannot permeate into the vacuum chamber ( 42 );
 furthermore, the gas mixture in the vacuum chamber ( 42 ) cannot enter into the bearing rooms ( 43 ); therefore, in operation, interior of the vacuum chamber ( 42 ) of the root vacuum pump ( 40 ) only has original air and the gas mixture without any impurities; moreover, liquid within the bearing rooms ( 43 ) cannot drain out of the casing ( 41 ).   
     
     
         16 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 15 , wherein the root vacuum pump ( 40 ) has a structure which can suffer a great pressure difference; the great pressure means that the root vacuum pump ( 40 ) can operate under an inlet pressure of 5000 Pa to 30000 Pa in a whole day under a condition that the condenser is in a vacuum state and can suffer from a pressure difference larger than 5000 Pa. 
     
     
         17 . The vacuum system having a condenser and a root vacuum pump set as claimed in  claim 15 , wherein the root vacuum pump ( 40 ) operates under temperatures larger than 130° C.